Good to hear you're making progress, Mark.
The suggestion to tweak the 'mixture' screws wasn't meant as a final fix - just a test to see if you had a clogged idle jet or not and a way to possibly get the car driving better until a thorough tune can be done.
One of the peculiarities of most carbs on our cars is that they will be a little harder to start after they've been driven, parked briefly, and restarted. There are a few reasons for this, but normally, this will clear up in the first mile or so. And again, a proper tune should do a lot to help that, too.
Let us know how things go.